Data in Action: Potential of SWOT for Sea Ice Monitoring Unveiled
The study underscores SWOT’s potential to provide two-dimensional estimates of sea ice thickness—essential to quantify exchanges between sea ice, the atmosphere, and the ocean, which current altimeters cannot provide. SWOT sea ice measurements can also support applications that demand greater spatial coverage and more frequent sampling, including process studies, seasonal forecasting, and navigation.
NASA Data Training Webinar August 21, 2025: Topic- Access Virtualized PO.DAAC Oceanography Data
Learn how to use Python and Xarray to access virtualized, exploratIon- and analysis-ready physical oceanography datasets from NASA's PO.DAAC.
NASA Earthdata Webinar July 30, 2025: From Space to Solutions: Access, Visualization, and Analysis Services for SWOT Hydrology
Learn how to work with SWOT hydrology data using tools provided by NASA's PO.DAAC and USGS.
SWOT River Reach GIS Feature Service Now Available
Explore SWOT Level 2 river data in the software of choice, such as ArcGIS, QGIS or Python
Data in Action: Sediment Accumulation at the Amazon Coast Observed by Satellite Gravimetry
By accurately measuring month-to-month mass changes across the Earth, a recent study shows that GRACE and GRACE-FO can be used to detect sediment accumulation. With more than 20 years of data, subtle mass changes can now be observed.
Data in Action: The 2022 Hunga-Tonga Hunga-Ha′apai eruption - Altimetry data and models help us understand how a volcanic eruption generated a tsunami
Dataset Highlight: River Discharge from the SWOT Mission
Dr. Hind Oubanas, CNES’s Surface Water and Ocean Topography (SWOT) Hydrology Science Lead, gives an overview of SWOT river discharge data products and algorithm development. Specifically, the Dr. Oubanas describes the work of the SWOT Discharge Algorithms Working Group (DAWG), detailing how river discharge is derived from SWOT observations, and what products are being developed and validated.

Science Disciplines

Ocean

Cryosphere

Terrestrial Hydrosphere

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Ocean Measurements

The Ocean includes geophysical parameters that characterize the oceans (e.g., temperature, salinity, sea surface topography, circulation, etc.) as well as those physical processes operating within the Earth’s oceans and at its surface. Select from below to learn more about the related measurements.

Ocean Temperature

Ocean Waves

Ocean Winds

Salinity/Density

Ocean Surface Topography

Ocean Circulation

Ocean Heat Budget

Gravity/Gravitational Field

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Cryosphere Measurements

The Cryosphere includes the portions of Earth's surface where water is in solid form, including sea ice, snow cover, glaciers, ice sheets, and frozen ground. Select from below to learn more about the related measurements.

Glaciers/Ice Sheets

Sea Ice

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Terrestrial Hydrosphere Measurements

Terrestrial Hydrosphere includes water on the land surface and underground in the form of lakes, rivers, groundwater, and total water storage. Select from below to learn more about the related measurements.

Surface Water

Announcements

Jul

Release of GHRSST Level 4 Sea Surface Temperature SPoRT dataset

The PO.DAAC is pleased to announce the public release of the GHRSST Level 4 SPoRT Global Foundation Sea Surface Temperature Analysis (v1.0) dataset produced by the NASA Short-term Prediction Research and Transition (SPoRT) project at the NASA Marshall Space Flight Center (MSFC). This dataset provides continuous, high-resolution, composited near-global (80N-80S) sea surface temperature fields twice daily at 2 km resolution for regional weather, maritime, and coastal applications.

The SPoRT SST analysis composites seven-days of Visible Infrared Imaging Radiometer Suite (VIIRS) and Advanced Very High Resolution Radiometer (AVHRR) satellite L2 SST data, with additional data from OSTIA and Geo-Polar Blended L4 SST products into a single analysis.

Jul

SWOT River Reach GIS Feature Service Now Available

The PO.DAAC is pleased to announce the availability of the Surface Water and Ocean Topography (SWOT) Level 2 River Single-Pass Vector Data Product as a Geographical Information System (GIS) service.

Made available through NASA’s Earthdata GIS. These services allow you to access, visualize and analyze SWOT River data through your GIS software of choice without the need to download.

The services are available as both ArcGIS REST Feature Service and Image Service endpoints, as well as Open Geospatial Consortium (OGC) endpoints.

For more information on all available services please visit the PO.DAAC Cookbook and GIS chapter which highlights how to access the services in ArcGIS Pro, QGIS and Python.

May

SWOT Science Data Products Transition from Version C to Version D complete

Dear SWOT User Community,

We are pleased to inform you that the transition to KaRIn Version D products is complete.

Version D products are accessible through NASA Earthdata Search client and easily downloadable from the command line with the podaac-data-subscriber. Additional tips for searching KaRIn HR data products can be found in the PO.DAAC Cookbook - SWOT Chapter. KaRIn Version C products continue to be available at the PO.DAAC.

Presentations and recordings from the recent webinar introducing KaRIn Version D, along with other related resources, are available in the "Datasets Information" section on the PO.DAAC SWOT Mission page.

Apr

Schedule update for SWOT Science Data Products Transition from Version C to Version D

Dear SWOT User Community,

As a follow-up to the original announcement, the transition to SWOT Version D products has been tentatively postponed by one week, and a new schedule is planned as follows:

Version D products will be generated for all measurements spanning the start of the calibration phase onward, and consist of:

Reprocessed products for observations from the start of the calibration phase (March 30, 2023) through cycle 32 (~May 19, 2025). The reprocessing of SWOT KaRIn Version D products is scheduled to start in April 2025 and is expected to complete in early 2026.
Forward-processed products for measurements from May 6, 2025 onward.

Navigation

Science Disciplines

Ocean Measurements

Cryosphere Measurements

Terrestrial Hydrosphere Measurements

Announcements